text: Termination is the process of breaking up the polymerase complex and ending the RNA strand. In eukaryotes using RNA Pol II, this termination is very variable (up to 2000 bases), relying on post transcriptional modification.
  Little regulation occurs at termination, although it has been proposed newly transcribed RNA is held in place if proper termination is inhibited, allowing very fast expression of genes given a stimulus. This has not yet been demonstrated in eukaryotes.